Had mine out a few years ago. I thought a couple of days off work should be enough, so I discussed it with my Fleet manager. We then rang my AME and between us decided that after a general anaesthetic 5 days minimum, would be prudent with the requirement to increase that time if it seemed necessary.
You need to get the effects out of your system, and both the effects and the length of time vary from individual to individual. In addition the surgery can leave some discomfort in your mouth as well as the possible need to be on antibiotics for a while.
The short answer is common sense and flexibility. Probably best to plan on around a week with the flexibility to extend or possibly reduce that time given your own set of circumstances.
Discuss it with your own AME and your company is probably the best advice I can give. You will be the best person to finally decide when you are "fit to fly."